This is my team http://www.ninjamanager.com/teams/268365 I was thinking
I would get 350 rock lee, fng rock lee, starter jiroube, pain jounin, itachi jounin, sasuke kage
Which summon should I get also how can I improve this team

4 HS 2 LS so gobi is the best summon for you, better for you to use the 2nd fng you get afterwards.another point is replace Pain jounin with cheaper akatsuki like yugito or neji so
team 1: 10+10(2 fng)+non tm genin+26(pain)+25(itachi)+34(sasuke)+15(gobi)= 120 ck
team 2: 10+10(2 fng)+tm genin(8)+18(neji)+25(itachi)+34(sasuke)+15(gobi)= 120 ck
team 3: 10+10(2 fng)+tm genin(8)+24(yugito)+25(itachi)+28(chiyo)+15(gobi)= 120 ck

since you are now silver, you can pick yugito and neji as jounins now if you havent defeated fire country yet so you can go all HS. any FNG if you want. drop the sound four combo since it is not your end game team and you will have a harder time to progress.

for HS tai, there's gai,lee,jiroubo,juugo(you need to defeat 3/5 other fng to pick new fngs) or ls nin you have kin,tayuya,konan,itachi, karin.